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+› /* Structures and definitions for magnetic tape I/O control commands.
Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
. */
/* Written by H. Bergman . */
#ifndef _SYS_MTIO_H
#define _SYS_MTIO_H 1
/* Get necessary definitions from system and kernel headers. */
#include
#include
/* Structure for MTIOCTOP - magnetic tape operation command. */
struct mtop
{
short int mt_op; /* Operations defined below. */
int mt_count; /* How many of them. */
};
#define _IOT_mtop /* Hurd ioctl type field. */ \
_IOT (_IOTS (short), 1, _IOTS (int), 1, 0, 0)
/* Magnetic Tape operations [Not all operations supported by all drivers]. */
#define MTRESET 0 /* +reset drive in case of problems. */
#define MTFSF 1 /* Forward space over FileMark,
* position at first record of next file. */
#define MTBSF 2 /* Backward space FileMark (position before FM). */
#define MTFSR 3 /* Forward space record. */
#define MTBSR 4 /* Backward space record. */
#define MTWEOF 5 /* Write an end-of-file record (mark). */
#define MTREW 6 /* Rewind. */
#define MTOFFL 7 /* Rewind and put the drive offline (eject?). */
#define MTNOP 8 /* No op, set status only (read with MTIOCGET). */
#define MTRETEN 9 /* Retension tape. */
#define MTBSFM 10 /* +backward space FileMark, position at FM. */
#define MTFSFM 11 /* +forward space FileMark, position at FM. */
#define MTEOM 12 /* Goto end of recorded media (for appending files).
MTEOM positions after the last FM, ready for
appending another file. */
#define MTERASE 13 /* Erase tape -- be careful! */
#define MTRAS1 14 /* Run self test 1 (nondestructive). */
#define MTRAS2 15 /* Run self test 2 (destructive). */
#define MTRAS3 16 /* Reserved for self test 3. */
#define MTSETBLK 20 /* Set block length (SCSI). */
#define MTSETDENSITY 21 /* Set tape density (SCSI). */
#define MTSEEK 22 /* Seek to block (Tandberg, etc.). */
#define MTTELL 23 /* Tell block (Tandberg, etc.). */
#define MTSETDRVBUFFER 24 /* Set the drive buffering according to SCSI-2.
Ordinary buffered operation with code 1. */
#define MTFSS 25 /* Space forward over setmarks. */
#define MTBSS 26 /* Space backward over setmarks. */
#define MTWSM 27 /* Write setmarks. */
#define MTLOCK 28 /* Lock the drive door. */
#define MTUNLOCK 29 /* Unlock the drive door. */
#define MTLOAD 30 /* Execute the SCSI load command. */
#define MTUNLOAD 31 /* Execute the SCSI unload command. */
#define MTCOMPRESSION 32/* Control compression with SCSI mode page 15. */
#define MTSETPART 33 /* Change the active tape partition. */
#define MTMKPART 34 /* Format the tape with one or two partitions. */
/* structure for MTIOCGET - mag tape get status command */
struct mtget
{
long int mt_type; /* Type of magtape device. */
long int mt_resid; /* Residual count: (not sure)
number of bytes ignored, or
number of files not skipped, or
number of records not skipped. */
/* The following registers are device dependent. */
long int mt_dsreg; /* Status register. */
long int mt_gstat; /* Generic (device independent) status. */
long int mt_erreg; /* Error register. */
/* The next two fields are not always used. */
__daddr_t mt_fileno; /* Number of current file on tape. */